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POWindows Mobile 6 AT commands
 

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    <p>I'm trying to get CellID using AT commands, but I dont get any response from the modem, mine code looks like below, I send AT+CCED command, but never get any response.</p> <pre><code>HANDLE hCom; char * xpos; char rsltstr[5]; DWORD returnValue; DWORD LAC; DWORD CellId; int bufpos; DCB dcb; COMMTIMEOUTS to; DWORD nWritten; DWORD event; DWORD nRead; char outbuf[20], buf[256]; hCom = CreateFile(L"\\\.\\COM9:",GENERIC_READ|GENERIC_WRITE,0,0,OPEN_EXISTING,0,0); if (hCom==NULL || hCom==INVALID_HANDLE_VALUE) { TCHAR szBuf[80]; DWORD dw = GetLastError(); // get the most uptodate cells _stprintf(szBuf, TEXT("CreateFile failed with error %d."), dw); MessageBox(0, szBuf, TEXT("Error"), MB_OK); hCom= NULL; return -1; } if (!GetCommState(hCom, &amp;dcb)) { return -2; } dcb.BaudRate= CBR_115200; dcb.ByteSize= 8; dcb.fParity= false; dcb.StopBits= ONESTOPBIT; if (!SetCommState(hCom, &amp;dcb)) { return -3; } if (!EscapeCommFunction(hCom, SETDTR)) { return -4; } if (!GetCommTimeouts(hCom, &amp;to)) { return -6; } to.ReadIntervalTimeout= 0; to.ReadTotalTimeoutConstant= 200; to.ReadTotalTimeoutMultiplier= 0; to.WriteTotalTimeoutConstant= 20000; to.WriteTotalTimeoutMultiplier= 0; if (!SetCommTimeouts(hCom, &amp;to)) { return -7; } if (!SetCommMask(hCom, EV_RXCHAR)) { return -8; } bufpos = 0; strcpy(outbuf,"AT+CCED=0,5\r"); if (!WriteFile(hCom, outbuf, strlen(outbuf), &amp;nWritten, NULL)) { return -10; } if (nWritten != strlen(outbuf)) { return -11; } if (!WaitCommEvent(hCom, &amp;event, NULL)) { return -12; } while(1) { if (!ReadFile(hCom, buf+bufpos, 256 - bufpos, &amp;nRead, NULL)) { return -13; } if (nRead == 0) // &lt;---- it alweys break here break; bufpos += nRead; if (bufpos &gt;= 256) break; } </code></pre>
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